Boiler-furnace



R. J. NELSON. BOILER FURNACE. APRLICATION men use. Is. 918.

1,365,943, Patented Jan. 18, 1921. $1.

UNITED STATES PATENT OFFICE.

ROBERT J'. NELSON, OF CHICAGO, ILLINOIS.

BOILER-FURNACE.

Application filed December is, 1918. Serial no, 266,944;

To all 1117mm it may concern Be it knownthat 1, Roman J. Nelson, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certainnew and use ful Improvements in Boiler-Furnaces, of which the following is a description, reference being had to the accompanying drawings, forming a part of this specification, in 5 which corresponding numerals of reference in the different figures indicate like parts.

The primary object of my invention is to )rovide a simple, cheap and effective boiler furnace which will be so constructed as to insure complete combustion of the gases rising from the forward portion of the grate, by causing them to be passed downwardly through a flue or conduit formed in the space between juxtaposed battle-plate members located in the fire-b0x above the grate and between the forward and rear ends thereof, into a secondary space or combustion chamber behind said bafiie-plate members and in advance of the boiler flues.

A further object is to so hinge or pivot said baffle-plate members as to enable them to be moved at will into abnormal, non-ob structing positions so as to provide for ready access to the boiler fines for cleaning or repairing them.

Again, it is my purpose to provide watercooling means for cooling said baffle-plate members and their hinged supports, while preventing leakage through the intervening joints :--all of which is'hereinafter more particularly described and definitely pointed out in the claims.

In the drawings,

Figure 1, is a longitudinal vertical section of a boiler furnace taken upon line 11, Fig. 2, viewed in the direction of the arrow there shown,

Fig. 2, is a horizontal section in plan. taken upon the line 2-2, Fig. 1,

Fig. 3 is a vertical section taken upon the line 3-3, Fig. 1, viewed in the direction of the arrow there shown, a portion of the hinged battle-plate member being broken away to show the water supply pipe tl'ierein, and

Fig. 4, is an enlarged vertical section in detail of one of the hinged joints, showing improved packing means therefor.

.eferring to the drawings, 1 indicates generally a stationary boiler furnace of well known construction, having the usual grate The latter are preferred.

2, firewall 3, at the rear of the grate, hollow transverse water-leg 4c, in communication with the boiler and supported upon said ing a part of the usual fire-box or combos tion chamber.

Located in the upper part of the fire-box and transversely thereof, is a baflie-plate or diaphragm 7, preferably formed from fireclay or other refractory material, which feature consists of a flat slab arranged to fit closely against the .top and side-walls and extend downwardly from the roof of the fire-box a predetermined distance, said slab being supported in place by means of a channel-1ron 8, located at the top of the swinging gates hereinafter described, and extending from the channel iron to the top of the furnace chamber. or fire box, the ends of which are rigidly secured to the side walls of the fire-box.

Tapped into the side-walls 9, of the firebox, upon opposite sides of the furnace, are

hollow nipples 10, 10, one above the other as in the manner shown in Fig. 3. Said nipples are, in turn, connected by means of elbow members 11, 11, one of which'is shown in Fig. l, with short vertical pipes 12 in alinement with each other and which, in turn, are connected in a well'known way by means of threaded sleeves 13, one of which is shown in Fig. 4, with an intervening perforated pipe 14, best shown in Fig. 3. The short pipes 12, at top and bottom serve as pivctal supports for counterpart bafi'leplate members generally designated by 15 and 16, respectively. In the example illustrated, each of. said baffle-plate members is made hollow throughout, and may either be formed from cast metal or steel plates welded together so as to make them integral. The member 15 consists ofa main hollow upright portion rounded at the front, as shown at 17, and squared at the rear, shown at 17, to engage the sidewall 9 and form a stop. Said upright portion is provided with hollow extensions or upright wings 18 and 19, extending laterally therefrom; said extensions being spaced apart and preferably substantially parallel to each other. The walls of said extensions are preferably connected by stay-bolts 15 It will be noted that the extension 18 is longer than 19. The member 16 is constructed in every respect like the member 15, except that the short and long extensions 20 and 21, Fig. 2, are reversed with respect to their fellows, so as to stand in staggered relation thereto, for the purpose of breaking joints. The extensions and 20 are preferably provided upon their meeting edges with overlapping counterpart hollow flanges or offsets 18 and 20, Fig. 2, while the parts 19 and 21 are formed with like features 19 and 21 for the purpose of enabling the baffle-plate to be adj usted to furnaces of varying width while maintaining a substantial closure for preventing a direct passage of the gases. The top of all of said extensions are, preferably, upon substantially the same level, namely, that of the lower edge of the slab 7, or its support which is located directly above and in the same plane with the extension members 19 and 21, when the latter are in their respec tive normal positions. The first members 01 extensions 18 and 2i) are of greater upright measurement than their fellows 19 and 2.1. in the rear, being extended downwardly, so that their lower edges may be in normal contact with the fuel, as indicated in Jig. 1, while the lower edges of the extensions or wings 19 and 21 are above that level.

I prefer to place the baffle-plate members in a plane somewhat nearer to the back than to the front of the grate, substantially as indicated, so that the forward combustion chamber for the generation of will be larger than that at the rear. The space between the front and rear baille-plate members or wings serves as a downward flue or conduit for the passage of the gases which are caused to rise from the fresh fuel upon the front of the grate, and, as in dicated, by the arrows, are caused to pass downwardly through said flue and outwardly into the rear combustion chamber in the zone of the most intense heat, thereby insuring complete combustion.

Each of the hinged battle-plate members is free to swing upon a vertical axis and their free ends may be moved forwardly so that they may stand parallel and adjacent to the side walls of the fire-box with which they are respectively connected, thereby leaving the fire-box unobstructed. for cl ing or repairs.

The hollow support to which each bafiie plate member is hinged is intended to serve as a means for water communication between the boiler and the interior of said member; and the manner of constructing the jointed and hinged connections with said support is of the utmost importance; not only for insuring the durability of the structure but for preventing leakage. This construction will now be described.

Formed in the upper and lower ends of the cylindrical portions of each balile-plate member and upon a common axis are circular depressions, one of which is shown in i v having a. cylindrical all 22-. a. web on 2 5, and an annular flange 2.1-, which o is shoulder adapted to bear loosely .ga net the end of the sleeve l5.

An annular member generally designated by 25, has outer and inner cimcentric walls 26 and 27, which are connected by means o 1' an integral web 28, the outer face ol which is arranged to contact with the inner face o." the web 23. An. opening 22) in the web 2 3 is intended to register with an opening ill) in the web 28. The latter may be held in such registering position by means of a screw ll. which connects the two webs. The parts so and 27 are of such diameters, respectively. as to leave an annular space between the wall 22 and the wall 20 and a similar space between the wall 27 and the surl'acc of the tube 12. The base of the web is made lo fill the entire space between the wall 22 and the tube 12, and is beveled upon opposite edges, as indicated at 3-52 and ll l. The ex terior of the part 26 is threaded lo receive an internally threaded flange 34; coiillcclicd by means of a web 35 with a sleeve 30. adapted to fit the pipe 12, and arranged to extend in. opposite directicms from the web the outer portion being made polygonal to enable it to be turned. The inner end of the part 34: is beveled as shown at fl? in an opposite direction from the bevel 12 and the inner end of the sleeve 36 is beveled as shown as 38, in an opposite direction from that of the bevel 33. A. packing 39 is interposed between the surfaces 32 and ll, and a like packing ll), between the surfaces 33 and lVhen the sleeve 36 is screwed down the packing is compressed and all leakage ol the joints is thereby prevented.

The water in the boiler is free lo circulate through the nipples 10, the pipes '12 and thence through the perforations in (he pipe 1% to the interior of the hollow ballleplal'o members 15 and 16. From thence it is lfrce to pass through the openings 2.) and l l into the annular space between the walls 26 and 27. It will thus be seen that all of the surfaces which contact and are adapted to move upon each other, including the 'iaclriir are water cooled and fully protected from being injured by heat.

The ballle-plate members are inl'clldcd to stand. normally .in the transverse positions indicated in l and 2, in which they are held against backward movement by {he stops 1T. lVhenever necessary to clean or repair the fines, a hooked rod may be placed beneath the respective members in turn. when they may be readily swung forward upon their hinges to the respective sides or the fire-box. The bearing members may be caused to turn upon the pipes 12 like a gate upon its hinges.

l l ll lifll .coolin I do not wish to be limited to the construe tion shown and described inasmuch as it may be varied without de arting from the spirit of the invention. or example, it is obvious that the hinged baffle-plate members may be constructed of a refractory ma terial and arranged to be operated in the same way, but I prefer to employ the waterfeature.

Having thus described my invention, I claim:

l. The combination with a furnace having a grate and a combustionchamber above it, of counterpart baflleplate members hinged upon substantially vertical axes upon opposite sides of the combustion-chamber between the ends of the grate, each member being provided with lateral upright extensions to form, when in normal positions, juxtaposed forward and rear baffle-plates extending across the furnace, the forward ones being in a plane in advance of and extending downwardly from a level below the top of the combustion-chamber to one below the normal level of the fuel, while the lower edges of the rear ones are upon a higher level, and means for closing the space in said combustion-chamber above said rear baffleplates.

2. The combination with a furnace having a grate and a combustion-chamber above it, of hollow counterpart baffle-plate members hinged upon substantially vertical axes upon opposite sides of the grate, each member being provided with lateral upright extensions to form, when in normal. positions, juxtaposed forward and rear baflle-plates extending across the combustion-chamber, the forward ones being in a plane in advance of and extending clownwardly from a level below the top of the combination-chamber to one below the normal level of the fuel, the lower edges of the rear ones being above said level, means for closing the Space across said combustionchamber above said rear baffle-plates, and means for causing a water-circulation from the boiler through said baffle-plates.

3. A furnace having a grate and a combustion-chamber above it, of a stationary transverse baflle-wall extending downwardly from the top of the combustion-chamber between the front and rear ends thereof to a predetermined level, counterpart bafile-plate members hinged upon upright water-containing hollow tubes located upon opposite sides of the furnace below said wall, said member having laterally extended upright wings arranged to form, when in normal positions, forward and rear baffle-plates ex tending jointly across the combustion-chamber and spaced apart to form a downward flue between them, the forward ones extending downwardly from a level below the top of the combustion chamber to one below the normal level of the fuel, the rear ones forming in effect a downward continuation of said wall and having their lower edges above said normal fuel level.

4. In a furnace having a grate and a combustion-chamber above it, baffle-plate members hinged upon upright axes located upon opposite sides of the furnace, said members having laterally extended upright wings arranged to form, when in normal positions, forward and rear baffle-plates extending in joint relation across the combustion-chamber between said upright axes and spaced apart to form a downward flue between them leading from the forward part to the rear of the combustion-chamber, the forward plates extending downwardly from a level below the top of the combustion-chamber to one below the normal fuel level while the rear ones form in effect a downward continuation of said. wall, their lower edges above said normal fuel level, and means for causing a water-circulation from the boiler through said baffle-platesand the supporting hinges.

5. In a furnace having a grate and a combustion-chamber above it, the combina tion of a pair of oppositely swinging hollow baffle-plate members hinged upon upright axes located upon opposite sides of the furnace, said members having laterally extended upright wings arranged to form, when in normal positions, forward and rear baflle-plates extending in joint relation across the combustion-chamber between said upright axes and spaced apart to form a downward flue between them in open communication with the front and rear portions of the combustion-chamber, the forward plates extending downwardly from a predetermined level below the top of the combustion-chamber to a position below the normal fuel level, while the rear ones extend from the upper position of the combustion chamber to a point above said normal fuel level, and hollow hinge-supports for said members, located on opposite sides of the furnace chamber and rigidly attached to the side-walls of the furnace, said supports being in open communication with the boiler and with the interior of said members.

6. The combination with a furnace having a grate and a combustion-chamber above it, of a hollow winged gate having a space between the wings to form a downward flue for the passage of unconsumed gases, said gate being hinged upon an upright axis located adjacent to aside-wall of the combustion-chamber, means for permitting a circulation of water from the boiler through the hinge of said gate to the interior of the latter, means for packing the joints of said hinge to prevent leakage, means for watercooling said packing, and a second doublewinged hinged gate provided with an up right Water-cooled supporting hinge member located at the opposite side of the furnace from the first-mentioned hinged gate, and adapted to swing into and out of engagement With the latter.

7. The combination with a furnace having a grate and a combustion-chamber above it, of a hollow Winged gate to form a down- Ward fine for the passage of unconsumed gases from the front to the rear or" the co1nbustion-chamber, an upright tube attached to the side-Wall of the combustion-chamber and extending from the bottom of said gate upward on the inside of the gate to a point above the top of the same, and adapted to communicate with the Water-containing space of the boiler to form a hinge support for said gate, said support permitting a flow of Water into said gate, annular packing members for admitting a flow of water into said gate, annular packing members for packing the hinged joints, and means for admitting a How of water into the annular spaces in said packing members.

In testimony whereof I have signed this 25 specification in the presence of two subscribing Witnesses, this thirteenth day oi December, 1918.

ROBERT J. NELSON.

lVitnesses DAVID H. FLn'roHnn, M. HARDING. 

